There are numerous ones. The "best" one, I think, is this one: http://knightsoftheoldrepublic.filef..._Clothes;83646
It changes the clothes that are those dreaded potatoe sacks to the K1 style outfits. They still exist in the game files, so it's not porting. You can also change the style of clothing by replacing the models and texture to what you want. Examples: